Răspunsuri

2014-04-17T13:37:25+03:00
A/10=2/b⇒ab=20
a*b-20:4=20-20:4=20-5=15
Daca b=40
a*40=20⇒a=20/40⇒a=2/4=1/2=0.5
2014-04-17T13:39:09+03:00
 \frac{a}{10} = \frac{2}{b} ⇒a·b=2·10⇒a·b=20-20:4⇒20-5=15
b=40⇒a= \frac{2*10}{40} ⇒a= \frac{20}{40} ⇒a= \frac{1}{2}